Add example test for otlploggrpc (#5615)

Part of https://github.com/open-telemetry/opentelemetry-go/issues/5056

exporters/otlp/otlplog/otlploggrpc/example_test.go

@@ -0,0 +1,33 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package otlploggrpc_test
+
+import (
+	"context"
+
+	"go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploggrpc"
+	"go.opentelemetry.io/otel/log/global"
+	"go.opentelemetry.io/otel/sdk/log"
+)
+
+func Example() {
+	ctx := context.Background()
+	exp, err := otlploggrpc.New(ctx)
+	if err != nil {
+		panic(err)
+	}
+
+	processor := log.NewBatchProcessor(exp)
+	provider := log.NewLoggerProvider(log.WithProcessor(processor))
+	defer func() {
+		if err := provider.Shutdown(ctx); err != nil {
+			panic(err)
+		}
+	}()
+
+	global.SetLoggerProvider(provider)
+
+	// From here, the provider can be used by instrumentation to collect
+	// telemetry.
+}